JPS62149370A - Painting method for vehicle body - Google Patents

Abstract

PURPOSE:To perform satisfactory painting without generating sagging and uneven painting by running a horizontal part by a top painting machine at a low speed with a large discharge and running a vertical part by a side painting machine at a high speed with a small discharge. CONSTITUTION:The top painting machine 30 for painting the horizontal part of a vehicle body 2 is formed by mounting painting guns 30c to posts 30a freely runnably provided in the longitudinal direction of the 3rd stage with a conveyor 1 in-between in such a manner that the painting guns can move vertically on a painting gun supporting part 30b attached to face downward. On the other hand, the side painting machine 31 for painting the vertical part of the vehicle body 2 is attached with painting guns 31c to the vertical part of a base plate 31b freely runnably provided in the longitudinal direction to the same 3rd stage so as to face the direction of the conveyor. These painting machines 30, 31 are placed on separate rails. The painting machine 30 is run at the low speed with the large discharge and the painting machine 31 is run at the high speed with the small discharge so that the painting is executed without sagging and uneven painting.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for painting a vehicle body.

(Prior art) Conventionally, for example, when painting the outer panel of an automobile body with respect to intermediate coating and L coating, the vehicle body is continuously conveyed by a conveying device and a reciprocator type or fixed type painting gun is used. A method in which painting is carried out using a circular automatic paint machine, etc. held in place, or a method in which the car body is transported in tact, stopping at each position and a paint machine holding a reciprocator type or fixed paint gun running automatically. A method in which painting is performed is known.

(Problems to be Solved by the Invention) However, in the former case, paint defects such as uneven paint are likely to occur due to vibration of the conveyor and misalignment of the car body; In this case, the top coating machine that paints the horizontal part (top) of the car body and the side paint machine that paints the vertical part (side) of the car body in an automatic painting machine are mounted on the same trolley and run with the same drive, so the running conditions are different. must be the same, and if the conditions for discharging the paint on the top and side sides are not adequately controlled, the paint film may become thin (on the top side) or sag (on the side), resulting in poor coating.

Therefore, the present invention has been made to solve these conventional problems, and its purpose is to provide a method for painting a car body that can perform good painting without causing sagging or uneven paint. It is in.

(Means for Solving the Problems) 1-According to the vehicle body painting method according to the present invention in order to solve the above-mentioned problems, the heavy body (2) is sent in tact, and each stage (3) to (8) is In a painting method in which a predetermined painting is performed at least once, when painting the outer panel part (2a) of the car body (2), one or more paints are applied to the horizontal part of the car body (2). Top painting m with gun (
30) and a side coating machine (31) with one or more guns for painting the vertical parts, each can be moved freely against the car body (2): the horizontal part runs at low speed with a large discharge volume. The 1% straight part is run at high speed with a small discharge amount to coat multiple coats.

(Function) According to the above means, the car body (2) is fed in tact and is stopped at each stage (3) to (8) for painting, so there is no vibration of the conveying device (1) and the car body (2) When painting the outer panel part (2a), the required coating thickness is formed by slowing down the traveling speed with a large discharge volume on the wood f part, and with a small discharge volume on the front straight part. Since the traveling speed is increased and the necessary film thickness is formed in 11 coats, coating defects such as sagging can be prevented.

(Embodiments) Preferred embodiments of the present invention will be described below based on the accompanying drawings.

Figure 1 is a diagram showing a car body painting process using tact transportation, where (1) is the transportation device, (2) is this transportation device (1), and (2) is the transportation device (1).
(3) to (8) show the vehicle body transported by tact.
) are the vehicle bodies (2) that are transported to the respective compartments.
2 and 3 are diagrams showing, for example, the painting section and its layout in the first stage (3). In the first stage (3), the first multi-articulated multi-robot (9) installed on the left side of the transport device (1) moves the left rear door (as shown in FIG. 2A).
10) Intermediate coating of the body side (10a) and door side (lob) is performed, and the second multi-direction multi-robot)
(11), the engine room (
12) right half (12a) and left half of bonnet m (
13b) Intermediate coating is performed. On the other hand, the transport device (1
) The third multi-articulated multi-robot (
14), the right half (15a) and drip (1B) in the trunk (15) as shown in Figure 2C I! The right half (+8a) of the right half (+8a) is painted with an intermediate coat, and the fourth multi-direction multi-robot (17) paints the body side (18a) and door side (t) of the right front door (18) as shown in the second diagram.
ab) Intermediate coating is performed. And the second stage (
In step 4), intermediate coating is applied to the areas left uncoated in the first stage. That is, as shown in FIG. 4 and FIG.
The left half (15b) and (16b) of the left front door (22) shown in FIG.
22b) is connected to the body side (24) of the right rear door (24) shown in FIG.
4a) and the door side (24b), and the right half (12 &) of the engine room shown in the fourth diagram and the left half (1
3b) are each coated with an intermediate coat and transported to the third stage (5).

In the third stage, the outer panel portion (2a) of the vehicle body is painted.

Figures 6 and 7 show the painting in the third stage, where (30) is the top coating machine that paints the horizontal part (top) of the car body (2), and (31) is the vertical part of the car body (2). This is a side painting machine that paints the (side). Top painting m (
30) is the third stage (5) with the transport device (1) in between.
A pillar (30a) provided so as to be freely movable in the length direction of
A paint gun support part (30b), on which a paint gun (30c) is attached with the paint gun (30c) facing downward, is attached to 30a) so as to be able to move up and down. On the other hand, the side coating machine (31) is mounted on a coating gun (31c) at the vertical part of the base (31b), (31b), which is also movable in the length direction of the third stage (5).
) is attached facing the direction of the conveyor.

These paint machines (30) and (31) are attached to their supports (30a
).

(30a) and bases (31a) and (31a) are provided in separate rules (32) and (33), respectively, so that they can run independently.

In this configuration, the horizontal part (top) of the outer panel part (2a) of the vehicle body is coated with top coating a (30) by reducing the traveling speed and using a large discharge to finish the coating in, for example, - times of coating. On the other hand, the vertical parts (sides) of the outer panel part (2a) of the car body are coated with side coating 411 (31) to increase the running speed and to coat the vertical parts (sides) several times with small discharge parts to prevent sagging and uneven coating. ! I try to form the necessary coating film while maintaining the consistency.

After painting the outer panel part (2a) of the vehicle body in the third stage (5), it is dried in the fourth stage (8), and then in the fifth stage (8).
First and second stage (3) at stage (7).

The top coat of each part performed in (4) was applied in the 6th stage (8), and the outer panel part (2a) was applied in the 3rd stage (5).
A top coat is applied and the product is transported to subsequent processes.

(Effect of the invention) As is clear from the explanation in 1- below, according to the present invention, 41L
Since the body is fed in tact and the painting is performed by stopping at each stage, painting can be performed without being affected by vibrations, positional deviations, etc. caused by the conveyance device. When painting the exterior panels, a top paint machine is installed to paint the horizontal part of the car body when it is stopped at the 1st position, and a side paint machine is installed to paint the straight part of the car body. ] On the horizontal part, use a high discharge speed and slow the running speed to form the required coating thickness in one coat, and on the vertical part, increase the traveling speed with a small discharge volume and apply several times. Since the necessary film thickness is formed by applying multiple coats, sagging and uneven coating can be prevented, and an excellent coating method can be provided.

[Brief explanation of drawings]

Figure 1 is a diagram showing the car body painting process using tact transportation, Figure 2 is a diagram showing each part painted in the first stage, Figure 3 is a diagram showing the layout of the first stage, and Figure 4 is a diagram showing the painting process of the car body by tact transportation. Figure 5 shows the parts to be painted in the second stage.
Figures 6 and 7 are diagrams showing the stage layout.
FIG. 6 is a perspective view showing the painting of the outer panel of the stage. FIG. 7 shows a front view. In the drawings, (1) is the transport device, (2) is the vehicle body, (2a) is the outer panel, (3) to (8) are the stop F position (stage), (9
), (11). (+4), (17), (2G), (21), (23
), (25) are multi-indirect multi-robots (painting robots)
, (12), (13), (15) are inner plate parts, (30
) is the top coating machine, and (31) is the side coating machine. Patent applicant: Honda Motor Co., Ltd. Agent
Person Patent attorney 2 11 Part 1 Patent attorney Kuni Ohashi Production volume Patent attorney Koyama Right Br attorney No.
IJI Shigeru 2 (B) (C) 1)a (A) (D) (C) (B) (D)

Claims (1)

[Claims] A painting method in which the car body is fed in tact and stopped at each stage to perform predetermined painting, which includes one or more guns for painting the horizontal part of the car body when painting the outer panel of the car body. A top paint machine and a side paint machine with one or more guns that paint the vertical parts are installed together, and each can move freely against the car body, and the horizontal parts are run at low speed with a large discharge amount to form a coating film. A method of painting vehicle bodies in which vertical parts are run at high speed with a small amount of discharge, and multiple layers of paint are applied.